77770000779 has 4 divisors (see below), whose sum is σ = 103693334376. Its totient is φ = 51846667184.

The previous prime is 77770000771. The next prime is 77770000783. The reversal of 77770000779 is 97700007777.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77770000779 - 2³ = 77770000771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77770000771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12961666794 + ... + 12961666799.

It is an arithmetic number, because the mean of its divisors is an integer number (25923333594).

Almost surely, 2^77770000779 is an apocalyptic number.

77770000779 is a deficient number, since it is larger than the sum of its proper divisors (25923333597).

77770000779 is a wasteful number, since it uses less digits than its factorization.

77770000779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25923333596.

The product of its (nonzero) digits is 1058841, while the sum is 51.

The spelling of 77770000779 in words is "seventy-seven billion, seven hundred seventy million, seven hundred seventy-nine", and thus it is an aban number.